Ecological Communities

What is secondary succession?

• Succession that starts on bare rock

• Succession that occurs where soil exists but has been disturbed

• Succession that happens after a volcanic eruption

• The final stage of succession where no further changes occur

What is the primary purpose of measuring dissolved oxygen in water bodies?

• To determine the temperature of the water

• To assess the health of a water body

• To measure the salinity of the water

• To check the clarity of the water

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

According to the diagram, what dissolved oxygen level supports abundant fish populations?

• 3.0 PPM

• 6.0 PPM

• 7.0 PPM

• >9.0 PPM

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

What is the minimum concentration of dissolved oxygen required by many fish species to survive and reproduce in water?

• 2 ppm

• 5 ppm

• 10 ppm

• 8 ppm

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NGSS.MS-LS1-5

How is dissolved oxygen consumed in water ecosystems?

• Through the evaporation of water

• Through the respiration of biota such as animals and bacteria

• Through the decomposition of organic materials

• Through the chemical treatment of water

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NGSS.MS-LS2-3

What is the primary objective of the Dissolved Oxygen Lab conducted at Refugio State Park?

• To study the effects of sunlight on water temperature

• To evaluate the health of the water after an oil spill to maintain ecosystem biodiversity

• To determine the recreational suitability of the water

• To test water clarity and pollution levels

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

What type of succession is shown going from figure A to figure B?

• primary succession

• eutrophication

• secondary succession

• intermediate

Tags

NGSS.MS-LS2-4

Diversity refers to the variety of habitats, communities, and ecological processes within and between ecosystems.

• Species

• Ecosystem

• Genetic

• Breed

Tags

NGSS.MS-LS2-5

NGSS.MS-LS4-1

(a)   species are critical to the functioning of an ecosystem

why are exotic species considered a threat to ecosystems?

• the ecosystems don't have enough space for them

• their behaviors are different than those that already exist

• they bring in different energy sources into the food web

• native species have no natural defense against them

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5